Top GRAPHQL GitHub Repositories & Tools (2026)

Turn any REST, SOAP, GraphQL or SQL API into MCP tools for Claude & ChatGPT. Self-hosted. 258 connectors: ERP, e-commerce, SAP.

Open-Source API Development Ecosystem • https://hoppscotch.io • Offline, On-Prem & Cloud • Web, Desktop & CLI • Open-Source Alternative to Postman, Insomnia

🔥 PlainApp is an open-source app that lets you securely manage your phone from a web browser. Access files, media, contacts, SMS, calls, and more through a simple, easy-to-use interface on your desktop.

Medplum is a healthcare platform that helps you quickly develop high-quality compliant applications.

React-based framework with performance, scalability, and security built in.

The open-source, cross-platform API client for GraphQL, REST, WebSockets, SSE and gRPC. With Cloud, Local and Git storage.

The Pokémon API

The industry-leading GraphQL client for TypeScript, JavaScript, React, Vue, Angular, and more. Apollo Client delivers powerful caching, intuitive APIs, and comprehensive developer tools to accelerate your app development.

A tool for generating code based on a GraphQL schema and GraphQL operations (query/mutation/subscription), with flexible support for custom plugins.

Zammad is a web based open source helpdesk/customer support system.

Ruby implementation of GraphQL

PHP implementation of the GraphQL specification based on the reference implementation in JavaScript

A framework for serving GraphQL from Laravel

Implement GraphQL servers and gateways with Fastify

The open source, cloud native tool for API Mocking and Testing. Microcks is a Cloud Native Computing Foundation incubating project 🚀

GraphQL (TypeScript) module for Nest framework (node.js) 🍷

Data API builder provides modern REST, GraphQL endpoints and MCP tools to your Azure Databases and on-prem stores.

KMP/CMP GraphQL based conference project with Jetpack Compose Android, Compose for Wear, and Compose Multiplatform Desktop, Web and iOS clients along with GraphQL backend.

Batteries-included backend that works with any stack.

Grafeo is a pure-Rust, high-performance graph database that can be embedded as a library or run as a standalone database, with optional in-memory or persistent storage. Grafeo supports both LPG and RDF and all major query languages.